| February 22, 1889 25 Stat. 676 |
Congress established the U.S. Circuit Court for the District of Montana and assigned it to the Ninth Circuit. The act became effective upon the admission of the State of Montana on November 8, 1889. |
| March 3, 1911 36 Stat. 1087 |
Congress abolished the U.S. circuit courts, effective January 1, 1912. |